@charset "utf-8";
@import "common/reset";

body{
    overflow: hidden;
    h2{
        position: fixed;
        top: 0;
        left: 50%;
        color: red;
    }
    .web{
        div{
            font-size: 0;
            div{
                width: 25%;
                padding-bottom: 44%;
                background: #fff;
                display: inline-block;
                box-sizing: border-box;
            }
            .b{
                height: 0px;
                color: #fff;
                font-size: 20px;
                overflow: hidden;
                vertical-align: top;
                background: black;
            }
            .w{
                background: #fff;
            }
            p{
                width: 25px;
                margin: 15px auto;
            }
        }
        .jianbian{
            animation: jin 1s linear;
            animation-iteration-count: 1;
        }
    }
}
@keyframes jin{
    from{
        height: 0;
    }
    to{
        height: 145px;
    }
}
